采用萃取法，用二乙基二硫代氨基甲酸钠测定茶叶中可溶性微量铜的方法。
To Survey and determine the solubility microcopper in tea with sodium diethyldithiocarbamape by means of Extraction.
茶多酚是茶叶中主要生理活性物质，其制造方法一般采用液-液萃取工艺，以醋酸乙酯为溶剂，从茶汤中萃取出茶多酚。
Tea polyphenol is the major physiological active component in tea, and it is generally manufactured by liquid-liquid extraction technology, using ethyl acetate as solvent from water extract of tea.
本文研究了红茶叶和超微茶粉可溶性固形物含量的萃取动力学过程。
The kinetics of extracting the soluble solid contents from black tea leaves in super-comminuted tea powder was studied.
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